Power supply device



FIG. 1 is a perspective view of a power supply device;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is an enlarged top plan view thereof; and,

FIG. 8 is an enlarged bottom plan view thereof.

The broken lines in the drawings depict portions of the power supply device that form no part of the claimed design. 

CLAIM The ornamental design for the power supply device, as shown and described. 